tests: move a config write to top of file since it applies to all tests
I'm about to add another test that depends on this config.
Differential Revision: https://phab.mercurial-scm.org/D6849
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false